Mechanical properties of materials

1: strength

2: stiffness

3: Elasticity

4: plasticity

5: Ductility

6: Brittleness

7: malleability

8: Toughness

9: Hardness

10: Resilience

11: Creep

(1)strength: it is the ability of material to register the external applied force without breaking or yielding.

(2)Stiffness: it is the ability of material to resist deformation under stress.

The modulus of elasticity e is the measure of stiffness

(3)Elasticity: it is property of material undergoes defamation and regains its original shape and size after removal of external force.

* this property is desirable for materials used in tools and machines

(4)Plasticity: it is the property of materials which retain the deformation produced under load permanently

* this property of material is necessary for forging, Stamping images on coin,and in ornamental work

(5):Ductility: it is the ability of material to undergoes defamation under tensile load.

Aluminium

(6):Brittleness: it is the property of material opposite to the ductility.

Cermets.

 ( it is the property of breaking of material with little permanent destruction)

(7)Malleability: it is the ability of material to undergoes deformation under compression load.

Aluminium

* due to its property metals can be hammered into thin sheets.

(8)Toughness: it is the property of a material to resist fracture due to high impact load like hammer blows. it is measured by amount of energy that unit volume of the material has observed after being trusted up to the point of fracture.

(9)Hardness: it is the ability of material to resist to wear, scratching, deformation and matching.

( it also means that ability of metal to cut and the metal)

 Diamond

(10) resilience: it is the property of a material to absorb energy and to resist stocks and impact loads.

* it is measured by the amount of energy absorbed per unit volume within elastic limit

* property is essential for spring material.

(11)Creep: it is a property of a material to undergo slow and progressive deformation over a period of time under constant stress.